The Figure below shows the configuration of the fixing control circuit.
FIXING TEMPERA TURE signal
Pressure roller
FIXNG HEATER CONTROL signal
Fixing film
Fixing heater
control circuit
Fixing heater
safety circuit
DC controller
Low-voltage power supply unit
Engine controller
Fixing control circuit
H1
TP1
TH1
• Fixing heater (H1): Heats the fixing film
• Thermistor (TH1): Detects fixing temperature (Contact type)
• Thermoswitch (TP1):Prevents an abnormal temperature rise of the fixing heater (Contact type)
These temperature controls in the fixing unit are performed by the fixing heater control circuit and the fixing heater safety circuit
according to the commands from the DC controller.
■ Fixing temperature control
The fixing temperature control maintains the temperature of the fixing heater at its targeted temperature.
Block diagram of this control is shown below.
2. Technology
23
Содержание LBP253 SM
Страница 1: ...Revision 1 0 LBP253 SM ...
Страница 11: ...Product Overview 1 Product Lineups 5 Features 6 Product Specifications 7 List of Parts 10 Operation 12 ...
Страница 69: ...Periodical Service 3 Periodically Replaced Parts 63 Consumable Parts 64 Periodical Service 65 Cleaning 66 ...
Страница 109: ...3 Press Release Button and open Front Cover Unit 1 Remove Multi purpose Separation Pad 2 2 1 4 Disassembly Assembly 102 ...
Страница 110: ...Troubleshooting 5 Trouble Shooting 104 Version Upgrade 108 Corrective Actions 114 Debug Log 120 ...
Страница 117: ...4 Click Next button 5 Select USB Device and click Next button 5 Troubleshooting 110 ...
Страница 118: ...6 Click Start button 7 Click Yes button for the warning message to start download Start download 5 Troubleshooting 111 ...
Страница 129: ...Error Jam Alarm 6 Error Codes 123 ...
Страница 135: ...Service Mode 7 Service Mode 129 ...